Development of Control System for Electrical Radiator Fan Using Dual Sensor & Microprocessor Based Electronic Unit

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  • Topic: Temperature, Thermostat, Cooling technology
  • Pages : 13 (3365 words )
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  • Published : March 19, 2013
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SAE TECHNICAL PAPER SERIES

2006-01-1035

Development of Control System for Electrical Radiator Fan using Dual Sensor & Microprocessor Based Electronic Unit Raman S. Badekar, Jitendra S. Mahajan, Sunil G. Kakaye, Pradeep N. Khire and K. Gopalakrishna TATA Motors Limited

Reprinted From: Thermal Systems & Climate Control (SP-2041)

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THIS DOCUMENT IS PROTECTED BY U.S. AND INTERNATIONAL COPYRIGHT It may not be reproduced, stored in a retrieval system, distributed or transmitted, in whole or in part, in any form or by any means. Downloaded from SAE International by University of Hertfordshire, Monday, February 04, 2013 10:28:55 AM

2006-01-1035

Development of Control System for Electrical Radiator Fan using Dual Sensor & Microprocessor Based Electronic Unit Raman S. Badekar, Jitendra S. Mahajan, Sunil G. Kakaye, Pradeep N. Khire and K. Gopalakrishna TATA Motors Limited

Copyright © 2006 SAE International

ABSTRACT
Use of Electrically powered radiator cooling fan with bimetal thermoswitch control is common in automobiles. Switching the electric fan ON and OFF at the desired cooling system temperatures is the biggest challenge faced by the system designers. This is due to poor response of the thermo-switch at different temperature rise rates (°C / min) of the cooling system. The thermal inertia characteristics of the bimetal sensors govern the effectiveness of such control systems. Control by use of traditional bimetallic strip based thermo-switch works effectively only when the system temperature rise rates (°C / min) is within a specified band. This results in overheating of the cooling system. This leads to design change for increased cooling capacity, which has a large impact on material cost increase & sometimes creates issues in packaging of engine cooling system...
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